Forms Data Controls :: DropDownList Binding And String Array
Jul 14, 2010
I have a gridview where I can browse an user's information. Through the gridview I'm also able to edit some of this information. A recent change in my client's needs demands that one of these fields is now a DropDownList. This field represents a user's "schedule" (not literally a schedule but works like one), and the different schedule options to be assigned to a user are shown in the drop down list.
Problem: In the drop down list I want to show list items like "9-12 15-17", "10-14 15-18" so that it is easy for the administrator to tell which schedule he's assigning to an user. However, that shouldn't be their actual value. I need "9-12 15-17" to actually be '1' since this is the schedule ID that I'm trying to pass on to the DB.
Here's what I have so far:
[Code]....
And with this last method I change the selected item's value to the Index. Meaning that if I select "9-12 15-17" which has an Index of 1 in the dropDownList, the actual value is now 1. Again, this is the behavior I expect. My experience with ASP is quite little as I'm new on this, but as far as I know, this only actually updates the string array. How would I go about modifying this to reflect my updates on the database? All input is taken into account.
I'm trying to bind a List<String> to a DropDownList in a user control. I think I'm doing the right thing, but it seems that after my code executes the bindings are cleared. Here's the code for review!
User control: <asp:DropDownList ID="subjectNameDropDown" runat="server"/> <asp:DropDownList ID="yearLevelDropDown" runat="server"/> Auto-generated designed code-behind: public partial class NewSiteMetadataUserControl { protected global::System.Web.UI.WebControls.DropDownList subjectNameDropDown; protected global::System.Web.UI.WebControls.DropDownList yearLevelDropDown; } Code-behind: public partial class NewSiteMetadataUserControl : UserControl { protected override void CreateChildControls() { subjectNameDropDown = new DropDownList(); yearLevelDropDown = new DropDownList(); } protected override void OnLoad(EventArgs e) { base.OnLoad(e); EnsureChildControls(); // Attempt 1 List<String> subjectNames = GetSubjectValues(); foreach (var subjectName in subjectNames) subjectNameDropDown.Items.Add(subjectName); subjectNameDropDown.DataBind(); // Attempt 2 List<String> yearLevels = GetYearLevelValues(); yearLevelDropDown.DataSource = yearLevels; yearLevelDropDown.DataBind(); } }
Should this approach work? If it should, how can I debug what happens after the code executes?
How do I bind a result from a JSON string to a dropdownlist (I have 2 fields), "NAAM" should be DataTextField and "CODE" should be the DataValueField. Using ddl.Items.Add doesn't do the trick.
I have a dropdownlist in datalist. I use arraylist to bind the datalist. In arraylist it is "DataNew" Class which has the property of DataTable "dt_city". Now I bind the DataTable to dropdownlist
Line73: <tr> Line 74: <td style="width: 100px; height: 24px"> Line 75: <asp:DropDownList ID="DropDownList1" runat="server" Line 76: SelectedValue='<%# DataBinder.Eval(((DataNew)Container.DataItem).dt_city,"city") %>'> Line 77: </asp:DropDownList></td>
But I got the error of: Server Error in '/AFIRS' Application. DataBinding: 'System.Data.DataTable' does not contain a property with the name 'city'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: DataBinding: 'System.Data.DataTable' does not contain a property with the name 'city'.
private void AddDBDataToControl(DataSet app_Support,int count) { int i = 0; while (count != 0) { DateTime dt = Convert.ToDateTime(app_Support.Tables[0].Rows[i]["FromDate"].ToString()); //dt=23/08/2010 10:04:00 AM DropDownList h1 = (DropDownList)GVDate.Rows[i].Cells[1].FindControl("txthour"); h1.SelectedValue = dt.Hour.ToString(); DropDownList m1 = (DropDownList)GVDate.Rows[i].Cells[2].FindControl("txtmin"); m1.SelectedValue = dt.Minute.ToString(); DropDownList h2 = (DropDownList)GVDate.Rows[i].Cells[5].FindControl("txthourto"); DateTime dt2 = Convert.ToDateTime(app_Support.Tables[0].Rows[i]["ToDate"].ToString()); //dt2=28/08/2010 14:25:00 PM h2.SelectedValue = dt2.Hour.ToString(); DropDownList m2 = (DropDownList)GVDate.Rows[i].Cells[6].FindControl("txtminto"); m2.SelectedValue = dt2.Minute.ToString(); count--; i++; } } When the function executes h1.SelectedValue = "10"; and m1.SelectedValue ="04"; but when it reaches to count-- h1.SelectedValue takes the value "14"; rather than h1.SelectedValue = "10"; and h2.SelectedValue = "14"; and m1.SelectedValue ="25"; rather than m1.SelectedValue ="04"; and m2.SelectedValue = "25"
these order numbers in table t2 have many part numbers(and hence the need for a second table t2)
I can display t1 using gridview just fine
In that same gridview iI have added a template column containing a dropdownlist(to show partnumbers)
now how can I bind this dropdownlist to the order number so that when the page is loaded the user can click on the dropdownlist to see all the partnumbers associated with that order number.
I'm having trouble binding my textbox to my dropdownlist. I got it to work but I don't think it is the correct way of doing it. I have my DDL bound to a datasource and populating everything correctly. However, I couldn't find a better way of binding my textbox to it besides using the FormView control and its counterpart, Templates (edit,insert,etc) It looks messy and i was hoping there was a better way of doing it. I've researched it online for awhile now but I couldn't understand how to implement for my situation.
My DDL has company names in it and the datasource has all the information from the table including what I'm trying to have my textbox pull (Address).
I have a Dropdownlist in an itemTemplate in a gridview. My gridView binds to dataTable1 (from which the selected value for dropdown comes from) and dropDown binds to dataTable2 (i need to get DataValueField and DataTextField from here).
I'm trying to bind a value to a dropdownlist. Here how the code looks like in the aspx page...Bind the textboxes below is not a problem...but its not working with the dropdownlist..
So basically, what i want is the value selected from the dropdownlist to be remembered after i press next button and back button..
i have an objectdatasource bound to the System.Web.Security.Roles getAllRoles methods, this method returns an string[] with the names of the roles, then i wanna bind a gridview with this datasource, but it shows me just a one column named length(the length of each role name), how can i instead the length of the string that represent the role name, put the role name?
I select a item from gridView and trying to show/update/delete in From view. In Form View I am using the dropdownlist filling it in Code behind. Then i bound the list. But the problem is it is not showing the slected value. Here is the code
I have a gridview that displays query results on a reporting page for a "home-grown" CRM application. From the gridview, a link can be clicked which opens a modal window that contains an iframe linked to a "details" page where record specific info can be viewed/altered. On the details page there are 10 or so dropdownlists (ddls) that are bound every time the page is called. The ddls are bound using a method similar to the example below. I am looking for a way top speed things up a bit. The details page could be called 10-20 times in one session and every time the page loads these ddls have to be bound from the same methods but for different records. What are some options for speeding up the load time for this page??
I am having problem to do a 2 way binding with DropDownList inside DetailsView, my markup declaration is:
[Code]....
But I am getting the following error messages on the line ddlCategoryId.DataBind(): ArgumentOutOfRangeException: 'ddlCategoryId' has a SelectedValue which is invalid because it does not exist in the list of items.sometimes I get different error: InvalidOperationException: Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.]
On page load, dropdownlist1 needs to be populated with a list of string objects in a specific table in a sql database. Everytime the selected item in the dropdownlist1 changes, dropdownlist2 needs to be populated with a different table from a database ( I don't know if it can be the same database or not). And it needs to be dynamic, so that everytime the value in dropdownlist1 is changed, the items in dropdownlist2 need to change. All this si being done in VB on a Web Form.
How would I go about doing this? What would the code look like?
How can i read multiple column values into an array list? I am trying to read a list of category names and category ids from database into an array list; i am then binding these values into drop-down list. With my current code, i am able to do with one column only but would like to pull both cat_name and cat_id so how can i do that?
I am trying to bind the datasource of a ddl which is located inside the EditTemplate of a TemplateField.When is the best time to bind this datasource (after loading grid, before editing, ? (Note: I must do this in code behind).I am currently trying to bind it on the edit command:
[Code]....
The issue is that the list retrieved from the LoadLists method is null when passing to the LoadList method where the datasource is bound.
Two ddl inside gridview. on selecting first ddl1 fill next ddl2 by passing selected value as parameter by executing the sqldatasource select command in codebehind.code:
GridViewRow gr = (GridViewRow)((DataControlFieldCell)((DropDownList)sender).Parent).Parent; //find the control in that DropDownList d1 = (DropDownList)gr.FindControl(ddl1); DropDownList d2 = (DropDownList)gr.FindControl(ddl2); SqliaDataSource.SelectParameters.Add("@name", d1.SelectedItem.Text.ToString()); dataView dv=(dataview) SqliaDataSource.select(DataSourceSelectArguments .Empty); Error: There is no source code available for the current location. and Returns null value
